A man who said he was involved in a 2013 drug buy in Bethlehem that ended in a shooting testified Thursday that before the deal went down, two men began arguing and grappling over a gun.

As Ian Juma and the man he was supposed to sell marijuana, Kawan Morrison, tussled outside a car parked near the Rose Garden, Melvin Cantrell heard a shot ring out, he testified.

The men scattered, Cantrell testified, but when he looked back, he saw the gun in Morrison's hands and a second shot was fired.

Juma ran to a friend's nearby home and banged at the door, telling those inside he thought he had been shot. Hours later, police said, Juma, 21, of Bethlehem, died from two gunshot wounds to the chest.

Although a wounded Juma told police he didn't know who had shot him the night of June 20, police spent more than a year and a half investigating the killing before charging Morrison in March.

After an emotional hearing, District Judge Michael Pochron ruled the homicide charge against Morrison should proceed to Lehigh County Court.

Morrison, 25, of Allentown, remains in the county jail without bail.

Throughout the nearly two-hour hearing, Juma's relatives sobbed loudly in court. After Cantrell testified he saw a gun in Morrison's hands and heard the gunshots, Juma's mother bolted from the courtroom and ran into the hallway crying.

Juma had agreed to sell marijuana for $1,000 to Darrell M. Turner, a Bloods gang member who knew Juma from school, police said. But, police said, Turner sent fellow gang member Morrison to close the deal.

Cantrell, 20, testified he wasn't sure why Juma and Morrison began "tussling," but saw the gun as the men wrestled for control before it went off.

"I was in shock," Cantrell testified. "I didn't react that quick. But when [Juma] began to run, I began to run."

Morrison was charged in March after authorities conducted dozens of interviews, analyzed multiple cellphones and records, and tested DNA on cigarette butts left at the crime scene.

Detectives said Juma and Morrison may have been meeting for the first time during the deal that spiraled into a dispute and shooting.

Police said Juma had a large backpack filled with four bags of marijuana packaged for sale and several cellphones.

After Thursday's hearing, Morrison's attorney, Brian Collins, said he believes prosecutors would have "problems" with the case and questioned Cantrell's testimony.